1.
2 + 7 =
9
1
|
2.
20 – 20 =
0
2
|
3.
20 + 0 =
20
2
|
4.
19 – 7 =
12
1
|
5.
3 – 1 =
1
2
|
6.
20 + 0 =
20
2
|
7.
9 + 6 =
1
15
|
8.
20 + 0 =
20
2
|
9.
5 – 2 =
1
3
|
10.
9 – 7 =
2
1
|
11.
15 – 4 =
1
11
|
12.
9 – 2 =
7
1
|
13.
9 – 0 =
1
9
|
14.
15 – 5 =
1
10
|
15.
7 + 8 =
15
1
|
16.
11 – 2 =
9
1
|
17.
15 + 4 =
19
2
|
18.
15 – 14 =
1
2
|
19.
1 – 0 =
1
2
|
20.
1 + 14 =
1
15
|
1.
2 + 7 =
9
1
|
2.
20 – 20 =
0
2
|
3.
20 + 0 =
20
2
|
4.
19 – 7 =
12
1
|
5.
3 – 1 =
1
2
|
6.
20 + 0 =
20
2
|
7.
9 + 6 =
1
15
|
8.
20 + 0 =
20
2
|
9.
5 – 2 =
1
3
|
10.
9 – 7 =
2
1
|
11.
15 – 4 =
1
11
|
12.
9 – 2 =
7
1
|
13.
9 – 0 =
1
9
|
14.
15 – 5 =
1
10
|
15.
7 + 8 =
15
1
|
16.
11 – 2 =
9
1
|
17.
15 + 4 =
19
2
|
18.
15 – 14 =
1
2
|
19.
1 – 0 =
1
2
|
20.
1 + 14 =
1
15
|